From bb39ebbadf6ebe66110124c7c05f0e3e84f299e8 Mon Sep 17 00:00:00 2001
From: Moritz Angermann <moritz.angermann@gmail.com>
Date: Thu, 24 Sep 2020 07:42:31 +0000
Subject: [PATCH] Source dist logic

---
 compiler/ghc/source-dist.nix | 40 ++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 compiler/ghc/source-dist.nix

diff --git a/compiler/ghc/source-dist.nix b/compiler/ghc/source-dist.nix
new file mode 100644
index 00000000..0e7851bc
--- /dev/null
+++ b/compiler/ghc/source-dist.nix
@@ -0,0 +1,40 @@
+{ src, stdenv, pkgs, version, ghc, alex, happy, hscolour }:
+stdenv.mkDerivation {
+
+    inherit version;
+
+    name = "ghc-source-dist";
+
+    buildInputs = [ ghc alex happy hscolour ] ++ (with pkgs; [ automake bash git cacert python3 autoconf xorg.lndir ]);
+
+    inherit src;
+
+    phases = [ "unpackPhase" "buildPhase" "installPhase" ];
+
+    buildPhase = ''
+    # Happy and Alex are confused about their data dirs. See
+    # https://github.com/haskell/cabal/issues/5862 for details.
+    #
+    # This is fixed in more recent builds.  We can't rely on
+    # custom built tools as computing the source-dist is pretty
+    # much in the bootstrap lane.
+
+    export alex_datadir=$(find ${alex}/share -name "alex-*" -type d -and -not -path "*doc*")
+    export happy_datadir=$(find ${happy}/share -name "happy-*" -type d -and -not -path "*doc*")
+
+    # We need to --skip-url-rewrites, ghc is a bit too strict here.
+    python3 ./boot --skip-url-rewrites
+     # let's not flood the screen with garbage.
+    ./configure --silent
+
+    # this folder ends up being needed for the windows dists; just mock it.
+    mkdir ghc-tarballs
+    make sdist --silent
+    '';
+
+    installPhase = ''
+    mkdir -p $out
+    install -Dm644 sdistprep/ghc-$(cat VERSION)-src.tar.xz       $out/src.tar.xz
+    install -Dm644 sdistprep/ghc-$(cat VERSION)-testsuite.tar.xz $out/testsuite.tar.xz
+    '';
+}
\ No newline at end of file